Gas and air mixing device.



E. c. WULFECK GAS AND AIR MIXING DEVICE. APPLICATION FILED NOV. 4. I9I8.

1,297,958. Patented Mar. 18,1919.

' a Wiinesses EdWQ/"(Z w, M 5m EDWARD C. W ULFECK, OF CINCINNATI, OHIO.

GAS AND AIR MIXING DEVICE.

Specification of Letters Patent.

Patented Mar. 18, 1919.

Application filed November 4, 1918. Serial No. 261,025.

To all whom it may concern Be it known that I, EDWARD C. WULFECK, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented new and useful Improvements in Gas and Air Mixing Devices, of which the following is a specification.

This invention relates to a gas and air mixing device, and the object is to provide means whereby the required amount of air is automatically admitted under varying conditions, so that complete combustion will take place at all times.

A further object is to provide for admitting under normal conditions a given supply of gas through a plurality of small apertures in a discharge device, means for admitting air of the required amount, and corresponding with the pressure of the gas being admitted at a given time, and means for increasing the flow of gas by way of a supplementary inlet, when required.

A still further object is to provide an auxiliary air inlet for admitting additional air when additional gas is admitted through the supplementary inlet.

With the foregoing and other objects in view, the invention consists in the novel construction, combination and arrangement of elements hereinafter described and claimed.

In the drawings,

Figure 1 is a top plan view of the device;

Fig. 2 is a view in side elevation, with parts broken away;

Fig. 3 is an end elevation.

The device herein described is intended for use in connection with apparatus employing artificial gas or natural gas for the heating of steam and hot water boilers, heatimlkg and cooking stoves, gas ranges and the A casing designated 10' has connection with a supply pipe 12 and is provided with a downwardly extending ofi'set portion 14:, open at one end and providin an air inlet. The walls of the casing ad acent to the opening are provided with inwardly turned flanges 15 cooperating with the automatic air inlet device, which latter comprises a gate or valve 16 pivotally mounted by means of 2 needle pointed screws 17, extending from opposite walls and engaging apertured portions 18 provided in the upper edge of valve member 16. This member 16 is provided with an opening 19 closed by door or valve member 20, this element last named serving the purpose indicated below.

The casing v10 may be .formed with the downwardly deflected portion 22 and with a threaded aperture 23 receiving tubular member 24 through which the gas is fed. A look nut 25 secures the tubular member in position.

The position of member 24 with reference to the outlet may be varied by reason of the threaded connection with the casing.

The inner end of the tubular member is provided with an inwardly extending flange portion 30 provided with a series/of aper tures 31 through which the gas passes. Member 30 is also provided with a central opening constituting a valve seat designed to cooperate with valve 33 carried by and forming a part of the stem 34: and extending through tubular member 24. This valve 33 is normally seated, a sufiicient quantity of gas being admitted under normal pressure through apertures 31.

The injection of the gas under pressure causes the opening of valve 16, owing to the reduced pressure on the inner side of the valve, the quantity of air admitted increasing or decreasing with the gas supplied.

In the event of unusually low gas res-' sure, when the auxiliary valve 33 is iillly opened and valve 16 is only partly opened, valve 20'may be opened for supplying the required amount of oxygen.

In the use of this device I not only secure automatic adjustment, but a maximum degree of efliciency, in view of the fact that the required amount of air for producing complete combustion is admitted.

The automatic air valve prevents back firing, thereby avoiding all danger in the use of the device.

What is claimed is:

1. In a device of the class described, a casing provided with an outlet and with an inlet located opposite said outlet, a tubular gas feeding device projecting through the opening last named and adjustable with reference to the outlet, said feeding device including an end member provided with a plurality of apertures and a centrally located bore constituting a valve seat, a valve and a stem'therefor, said stem extending through said tubular member, means for controlling said stem, an air inlet for the casing, and a gate valve closing said inlet, said valve last named being opened under atmospheric pressure and closed by gravity.

2. In a device of the class described, a casing provided With an outlet and with an inlet located opposite said outlet, means for injecting gas through said inlet and con trolling the volume of gas admitted, said casing being provided with a downwardly 10 extending portion having an opening there- Gopies of this patent may be obtained for five cents each, by addressing the Gommissioner or.

Leer/see in constituting an air inlet, a gate valve pivotally mounted and normally closing the opening by gravity, said valve being opened under atmospheric pressure When the pressure within the casing is reduced by the injeotion of gas into the casing and through the outlet.

In testimony whereof I afix my signature.

EDWARD o. WULFECK.

Patents,

Washington, 3. i9. 

